Transactions of the American Philosophical Society

2nd ed Account acid Allegheny Mountains Amer American Philosophical Society analysis anatomy ancient animal Astronomical observations atmosphere Barton bones called causes CHARLES Chase climate coal collected Committee construction continued Cope County Delaware Description determine Dillon discovered discovery Dunbar early eclipse effects Ellicott ether experiments extinct fauna figs Fish formation fossil Franklin French genus geology Hare Hayden head heat HENRY Hist improvement Indians insects intensity Island JAMES Jefferson JOHN June land language Leidy Lenni Lenape lignite linguistic longitude magnetic dip measuring Memoir method Missouri natural North America northern Notes Notice Ohio Paleontology Pennsylvania Philadelphia places plants Pleistocene region relating remarks Report Rittenhouse River ROBERT Scott Series skull Smith solar eclipse species survey Tertiary THOMAS tion transit of Venus Unionidae United Valley Virginia volume West western White WILLIAM Wood